Exemple #1
0
        /// <summary>
        /// Determine if the two diffs overlap
        /// </summary>
        /// <param name="diff1">One of the objects to test</param>
        /// <param name="diff2">One of the objects to test</param>
        /// <returns>true if the diffs overlap else false</returns>
        public static bool Intersects(Diff diff1, Diff diff2)
        {
            var start1 = diff1.Ancestor.Span.Start;
            var end1 = diff1.Ancestor.Span.End;
            var start2 = diff2.Ancestor.Span.Start;
            var end2 = diff2.Ancestor.Span.End;

            //true if start of one is within start of the other (inclusive)
            return (start2 <= start1 && start1 <= end2)
                || (start1 <= start2 && start2 <= end1);
        }
Exemple #2
0
        /// <summary>
        /// Generates Diff results for each change that occurred from the ancestor to the changed
        /// </summary>
        /// <param name="ancestor">
        /// The abstract syntax tree that the changed version originated from
        /// </param>
        /// <param name="changed">The abstract syntax tree that resulted from changing the ancestor</param>
        /// <returns>Changes between the ancestor and changed</returns>
        public static IEnumerable<Diff> Compare(SyntaxTree ancestor, SyntaxTree changed)
        {
            var offset = 0; //Tracks differences in indexes moving through the changed syntax tree
            foreach (var change in changed.GetChanges(ancestor))
            { //Assumes that this list is sorted by place in file
                var origLength = change.Span.Length;
                var offsetChange = (change.NewText.Length - origLength);

                var chanStart = change.Span.Start + offset;
                var chanLength = origLength + offsetChange;

                offset += offsetChange;

                var d = new Diff
                {
                    Ancestor = SpanDetails.Create(change.Span, ancestor),
                    Changed = SpanDetails.Create(new TextSpan(chanStart, chanLength), changed)
                };

                yield return d;
            }
        }
Exemple #3
0
 /// <summary>
 /// Determines if a single diff intersects with any number of other diffs
 /// </summary>
 /// <param name="diff">single diff that will be compared against many</param>
 /// <param name="diffs">multiple diffs that will be compared against a single diff</param>
 /// <returns>true if an intersection occurs else false</returns>
 public static bool IntersectsAny(Diff diff, IEnumerable<Diff> diffs)
                                                 => diffs.Any(d => Intersects(diff, d));